The first men and women who traveled in space - in the 1960s - depended on the sacrifices of other animals that gave their lives for the advancement of human knoweldge about the conditions in outer space beyond this planet's protective ozone layer, about the effects of weightlessness on living organisms, and about the effects of stress on behavior.
Preparations for human space activities depended on the ability of animals that flew during and after the 1940s to survive and thrive.
3 comment(s):
Just wanted to comment that these animals did not "give" their lives. They were taken.
You're right! But 'gave their lives' is a common used expression.
I suspect that saying that the animals "gave their lives" makes the author feel better than saying that these animals were no better treated than laboratory beagles being forced to smoke.
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